Desempenho acústico de sistemas de vedações verticais internas: avaliação de conjuntos de portas e paredes separadas pelo hall de entrada

Abstract

Sets of walls and doors separated by condominium corridors in residential buildings started having their acoustic performance evaluated when the Brazilian standard NBR 15575 came into effect, which concerns the performance of buildings. In this context, this study proposed to determine the influence of the characteristics of constructive elements – doors and corridors between residential units – on the airborne sound insulation of the set of walls and doors separated by the entrance hall. First, a pilot study was conducted based on tests performed on many buildings, but it was noted that a deeper study on the subject would be required. Thereby, three buildings were chosen and a series of acoustic performance tests was executed, covering several situations. Maneuvers for sealing door gaps were used as well, in order to assess the performance gains of the system. The results indicated loss of acoustic performance when there were more gaps between the door leaf and the floor. Moreover, relations were found regarding the reverberation time of the corridors and the distance between the entrance doors of residential units.